Mounting for slicer blades



NOV. 30, 1937. D` M, FlNCKE y 2,101,002

MOUNTING FbR SLICER BLADES Filed Dec. lO, 1936 /J2 /a/ z2 jf/f INVENTORl 2 i @fw/a v274 F, /6 Il: /75

ATTORNEY Patented Nov. 30, 1937 nnirso sraras 2,101,002. Y MOUNTING non suona BLADES DonaiaM. Fineke, Great Neck, N. Y., assignomo American Machine &

Foundry Company, a corporation of New Jersey Application December 10, 1936, Serial No.111``,115'

4 Claims.

This invention relates to slicing mechanism, and more particularly to improvements in the means for mounting slicer blades in the frames used in bread slicing machines.

In machines generally used in the past, the slicer blades have been provided at their top and bottom ends with pins xed in holes in the blades adapted to engage the holding means provided in the frames.Y Since the blades are quite thin and oiTer very little bearing surface for the pins it has been almost impossible heretofore to accurately position the pins in thevblades, and they have often been secured in the blades askew, and away from the desired right angular position which they should occupy. Inasmuch as the blades must be held taut and are, therefore, under considerable tension at all times during their use, considerable wear has'resulted around the pins causing them `to become loose in the blades, or making it impossible for the blades to assume a correct position in the frames thereby causing the loaves to be poorly sliced.

It `can be seen therefore that it is imperative that some means be provided that will allow blades to be properly positioned and held in the slicing mechanism, and not be subject to the disadvantages above mentioned.

In the present invention, the lower portion of the slicer frames are provided with spaced slot'- 30 ted projections preferably integral therewith, de-

signed to guide the blades. The projections which are located comparatively near the bottom end of the blades, permit a pin to be used as heretofore, and eliminate any side thrust of the 35 blades at this point, thereby preventing Wear of the holes thus securely holding the pins. In the embodiment shown the upper end of each blade is equipped with a rivet, the head of which bears against the other side'of the blade. With this construction the blade is rigidly held preventing looseness of the blade and holding means to occur, thus assuring a perfectly sliced loaf. In order to mount the blades each holder is provided with V-shaped notches which act as self aligning means for the blades, and no matter how much or little tension is applied the support rivets will nt snugly into the notches and align the blades in their proper position at right angles to the longitudinal axes of loaves to be sliced. This rivet and support arrangement after careful study and experimenting with dilerent holding means has been found to be best suited to withstand and remain intact with'the blades and overcoming vibration of the blades in the unguided cutting space between the lower guides and'upper holding means. In thel usual blade and pin construction a distinct separation of parts always exists, but with the rivet construction the bladesupporting devicebecomesior-all practical purposes an integral parti offtheblade structure. It will bev understood: thatthe bot-4 tom endaofthe blades may also beV equipped in the same manner as their upper ends.

It is an object of this invention to furnish improved means for mounting vslicer blades in operating position and greatly diminish anypos-t sibility of blades being incorrectly positioned with respect to loaves to be sliced.l

It is a further objectA of this invention to provide slicer blades having novelA meansV for supe. porting them inslicing position.- i

It isa furtherobject to provide-slicing blades Vwith supportingrneans comprising rivets-.inserted through apertures-at one -or both ends .of jav blade which rivets are secured in correct'position by means of' collars xed to thefends of the rivetsthat project through the apertures inthe blades;

It is an additional object to providey novel means integral with the bladeframesJforpre-A venting.V lateral movement of`` blades: secured therein. Y Y

The invention also consists of= meanszformed on the blade supporting frameadjacent to thel blade? mountings for preventing lateral movementiof blades near said mountings during the operationV of the slicing machine. Y

The invention alsocomprises novel# means for supporting blades in which A supportingY arms vare provided with VV-shaped` notches vvhichactv as self aligning positioning means for the? blades and insure each blade being-.positioned accurately with respect to loaves to besliced.'

With theseand other' objects not-v specifically mentioned inview, the\--invention consistsin. certainV constructions and combinations which will be hereinafter fully described, and then specifically set forth in the claims hereunto appended.

In the accompanying drawing which forms a part of this specification and in which like characters of reference indicate the same or like parts:

Fig. 1 is a sectional side elevation showing the slicer blade mounted upon the improved slicer frame;

Fig. 2 is an enlarged view of the upper portion of a slicer blade equippedwith the improved mounting means; and

Fig. 3 is a fragmentary detail view in vertical section, taken on the line 3-3 of Fig. 2.

.Referring to the drawing, the slicer frame l0 which may be of the type shown in Patent No. 2,011,043 granted to L. Ferenci August 13, 1935, is provided near its face with spaced slotted lugs or arms I I engaging and guiding the slice blades I2. Pins I3 supported in the lower end of the blades protruding from either side of the blades, are engaged and held in position by a slotted portion I 4 of pivotally mounted arms I5. Arms I5 are mounted on a rod I6 carried by the frame Ill and so spaced as to engage the pin I3 of each of the series of blades I2. The distance from the lugs II to the pins I3 is comparatively small, and the rigidity of that part of the blade which extends there between overcomes any side thrust communicated from the operating stretch I 2, therefore the pins are correctly positioned and rigid in the blades. The upper ends of the blades are each provided with a rivet I'I. In the embodiment shown a shouldered rivet is used which on its shouldered part I'Ia supports a collar I8, Fig. 3. An opening I'Ib is provided in each blade to receive the shouldered portion Ila of the rivets, the holes being so made as to permit a press t of the shoulder. A suitable collar I8 is then placed on the rivet and secured thereon, as shown in the drawing. When the collar I8 is mounted on the shoulder Ila, a portion of the rivet protrudes beyond the same, as indicated in dotted lines, and this portion is peened and pressed to fill the countersunk section I8afl of the collar. It is obvious however that other methods of securing the rivets and collars in place may be used. In this manner the rivet and collar become a permanent part of the blade, and will remain rigid with respect tothe blade.

A series of spaced slotted lugs or arms I9 at the upper end of frame IIB are provided with V- shaped notches 2D adapted to engage the rivet I'I and collar I8, thereby positively aligning the blades I2 as they are tted into slicing knives. Adjacent to the upper rivet, each slicer blade I2 is provided with an opening 2I which permits an easy and convenient means for insertion or renewal of the blades in the 'frame l0.

Compression springs 22 at the base of frame I exert a constant pressure against the arms I whereby tension is applied and maintained upon the Slicer blades.

The various means referred to may be varied in construction within the scope of the claims, for the particular device selected to illustrate the invention is but one of many possible concrete embodiments of the same. The invention is not, therefore, to be restricted to the precise details of the structure shown and described.

What is claimed is:

1. A knife blade for a bread slicing machine comprising a thin, flat, elongated body having a sharpened edge and a blade supporting member comprising a rivet projecting through and beyond the faces of said blade, and said rivet having at each side of the blade a head of considerablir larger diameter than that of the rivet shank, each head having a face engaged firmly with a contiguous annular area of the blade, and said heads being of like dimensions and contour, presenting at each side of the blade a smooth cylindrical bearing surface extending outwardly at right angles to said annular area.

2. A knife Ablade for bread slicing machines comprising a thin, flat, elongated body with a sharpened edge having apertures adjacent to each end thereof, and a blade supporting member comprising a rivet in each of said apertures, at least one of said Yrivets being formed with a shank tightly xed in its said aperture, and with cylindrical bearing heads at each side of the blade, one head being of one-piece with said shank, and a symmetrical separately formed head at the other end constittued by a collar fitted upon the free end of said shank of the rivet and held against said blade by the peened end of said rivet.

3. A knife blade for a bread slicing machine, comprising a thin, flat, elongated blade body with a sharpened edge, and an aperture adjacent to an end thereof, a blade securing means including a cross supporting member comprising a rivet transflxing said aperture and extending substantially at right angles to the plane of the blade at either side thereof for securing the blade in ope ative position in a knife support having means for holding a blade therein and preventing pivoting of the blade while so held, said rivet projecting through and beyond the faces of said blade, and means for securing said rivet in said blade and furnishing cylindrical bearing surfaces cooperating withl a suitable support having deeply notched V-shaped bearing surfaces, to hold the blade in operative slicing position.

4. In a knife blade for a machine of the class described: comprising a thin, dat, elongated body with a sharpened edge having an aperture near one end thereof: a blade-supporting member comprising a rivet having a shank xed tightly in said aperture, and having a cylindrical head of equal dimensions at each side of said blade, the head at one side being formed in one piece With said shank, and the head at the other side of the blade including a separately formed annular collar having a large central orifice transxed by the free end of said one-piece rivet shank, the latter being upset into a counter-sunk mouth of said collar; and said two-headed rivet thus providing two cylindrical, symmetrical bearing surfaces for engagement with complementa] bearing surfaces cf a supporting member in a blade frame.

DONALD M. FINCKE. 

